JPH08228262A - Image input device - Google Patents

Abstract

PURPOSE: To facilitate the operation of original mount or original dismount by providing a means locking an original support means to a placing means and a means releasing the locking by the lock means. CONSTITUTION: When a film holder 61 is manually inserted into a stage 47 at an insertion standby position, a slide section is energized at first by a plate spring 94 and a slope 66 is progressed while lifting up a positioning shaft 100. Then the positioning shaft 100 is fallen into a positioning hole 67. When the hand is released, the position is confirmed among the positioning shaft 100, a step 107 and the positioning hole 67 with a push-back force and the film holder 60 is locked on the stage 47. Furthermore, when a stage motor is driven to move the stage 47 to a discharge side from the insertion standby position, a see-saw member 99 is turned in a direction to be released from the positioning shaft 100 and the positioning hole 67. When the stage 47 is moved from the insertion standby position to the discharge side, the positioning shaft 100 is released from the positioning hole 67.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image input device for reading an image of a reflective original or a transparent original.

[0002]

2. Description of the Related Art As a conventional example of an image input device, a so-called 35 mm slide film scanner is shown in FIG.
As shown in FIG. In these figures, a film 1 as a transparent original is held by a mount portion 3 of a slide 2.

The slide 1 is detachably held on a holder 5 provided on a stage 4 by a leaf spring (not shown). The stage 4 is driven by the stage drive mechanism. The stage drive mechanism includes a lead screw 6, a stage motor 7, a guide bar 8 and a guide member 9. The lead screw 6 is screwed onto the stage 4.
The stage motor 7 is for rotating the lead screw 6. The guide bar 8 engages with the guide member 9 and guides the horizontal movement of the stage 4.

The film 1 is a light source 1 such as a halogen lamp.
It is irradiated by the light flux emitted from the heat ray absorption filter 12, the diffusion plate 13, the color filter 14, and the condenser lens 15 from 1. The transmitted light that has passed through the film 1 has its optical axis bent in the vertical direction by the mirror 16 and the lens 17
An image is formed on the CCD 18, which is a line-type image sensor. In this way, the image on film 1 is CCD1
8 read. The CCD 18 photoelectrically converts the image and outputs the image signal to an image processing unit (not shown).

The color filter 14 has three colors of red, blue and green.
A color filter is provided, and a color image is input by alternately irradiating the same image. The lens 17 and the CCD 18, which is a line-type image sensor, are fixed and held on the image-forming-portion support member 21 at regular intervals. Further, the image forming unit support member 21 is driven by the focusing drive mechanism.

The focusing drive mechanism comprises a lead screw 22, a focusing motor 23, a guide bar (not shown) and a guide member (not shown). The lead screw 22 is screwed onto the imaging unit support member 21. Focusing motor 23
Is for rotating the lead screw 22. The guide bar (not shown) engages with the guide member (not shown),
It is for guiding the lens 17 and the CCD 18 in the optical axis direction.

In the image processing unit (not shown), in addition to image input processing, processing such as automatically performing the focusing operation while driving the focusing driving mechanism to perform contrast calculation is performed. The case 24 serving as a storage means has a recess 24 a forming a moving space of the stage 4, and a recess 2
Projections 24b and 24c are formed on both sides of 4a, respectively. The light source 11, the heat absorption filter 12, the diffusion plate 13, the color filter 14, the condenser lens 15, and other illumination units and the power supply 25 are housed in the one convex portion 24b. The other convex portion 24c has a mirror 16 and a lens 1.
An image forming unit such as 7 and CCD 18, and a drive mechanism of the stage 4 are housed.

The recess cover 30 can be manually moved,
It is opened when the slide 2 is set on the stage 4, and closed when the image is read. FIG. 10 shows the recess cover 3
0 shows a closed state and FIG. 11 shows an open state. Convex part 2
On the side surface of 4b, an air intake hole 26 as an air suction means is provided at a side surface position of the condenser lens 15.
An exhaust fan 27 is provided near the light source 11 on the convex portion 24b as an air exhaust unit. The exhaust fan 27 discharges the heat generated from the light source 11 and the power supply 25 to the outside of the case 24.

When reading an image, the reading range is specified on the host computer. The amount of light and the accumulation time of the CCD are adjusted according to the density of the original,
During that time, the setting of the reading range is stored.

[0010]

In the image input device constructed as described above, the user performs the following operations when setting a document. First, the recess cover 30
Is manually opened, and the slide 2 is inserted into the leaf spring portion (not shown) of the holder 5. Then, it was necessary to manually close the recess cover 30 again. Further, when the document is taken out after reading, it is necessary to manually open the recess cover 30 and then take out the slide 2 from the leaf spring portion of the holder 5.

Opening and closing the recess cover 30 is a complicated operation. In addition, the operation of setting the slide 2 in the holder 5 and removing the slide 5 was complicated. The present invention has been made in view of the above problems, and it is an object of the present invention to provide an image input apparatus that can easily perform an operation of attaching and detaching a document.

[0012]

In order to solve the above problems, in the apparatus of the present invention, the illumination means 11 for illuminating the original 1 is used.
And photoelectric conversion means 1 for reading the image of the illuminated original 1.
8, an original holding means 60 for holding the original 1, and a placing means 47 for placing the original holding means 60. In the image input device, a locking means for engaging the original holding means 60 with the placing means 47. 67, 100, 98 and locking means 67, 10
The lock release means 104 for releasing the lock by 0 and 98 is provided.

[0013]

In the apparatus of the present invention, the locking means 67, 100, 98 for locking the document holding means 60 to the placing means 47 and the unlocking means for releasing the locking by the locking means 67, 100, 98. Since it has 104, it is possible to easily attach and detach the document.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the image input device of the present invention will be described below with reference to the drawings. In the following figures, the parts corresponding to those of the conventional example shown in FIGS. 9 and 10 are designated by the same reference numerals, and the description thereof will be omitted as appropriate. FIG. 1 is a vertical sectional view for explaining a first embodiment of an image input device according to the present invention.

FIG. 2 is a perspective view for explaining a first embodiment of the image input apparatus according to the present invention, showing a document holder. FIG. 3 is a plan view of a document holder used in the first embodiment of the image input device according to the present invention. FIG. 4 is a perspective view for explaining a method of using the document holder used in the first embodiment of the image input device according to the present invention.

FIG. 5 is a perspective view for explaining the first embodiment of the image input apparatus according to the present invention, and shows the main part of the stage. FIG. 6 is a vertical sectional view for explaining the first embodiment of the image input apparatus according to the present invention, and shows a state in which the document holder is positioned on the stage. First, the image input device of the first embodiment will be described.

In FIG. 1, the case 31 is formed in a box shape, and an insertion opening 32 for inserting and removing the film holder 60 is provided on one front surface of the case 31. A door 34 that rotates around a shaft 33 is attached to the insertion port 32. The inside of the case 31 is composed of almost three layers. The three layers are composed of an illumination unit 35, a document scanning unit 36, and an image forming unit 37 in this order from the top.

The illumination section 35 is a light source 11 such as a halogen lamp arranged on the right side in FIG. 1, a heat absorption filter 12, a diffusion plate 13, a color filter 14, and a first condenser lens 4.
1, a first mirror 42, a second mirror 43, a third mirror 44, a second condenser lens 45, and the like. The light emitted from the light source 11 has its optical paths bent vertically by the first, second, and third mirrors, and irradiates the surface of the film 1 in the vertical direction. Therefore, since the optical path is folded and arranged parallel to the surface of the film 1,
The illumination unit 35 has a thin structure.

The original scanning section 36 is composed of a film holder 60, a stage 47, and a drive mechanism including the lead screw 6 and the stage motor 7. The lead screw 6 and the stage 47 are arranged substantially parallel to the illumination optical path from the light source 11 to the first mirror. The image forming unit 37 includes a mirror 46, a lens 17, a CCD 18, and the like. The mirror 46 is arranged so that the optical path after the reflection by the mirror 46 is substantially parallel to the illumination optical path from the light source 11 to the first mirror. Since the image of the film 1 is read by the line type CCD 18, the illumination area on the film 1 may be a linear shape corresponding to the CCD 18. That is, since the Fresnel type condenser lenses 41 and 45 and the mirrors 42, 43 and 44 which form the illumination unit 35 may be linear, the optical path of the illumination optical system can be arranged by folding as described above. Therefore, the illumination unit 35 can be made thin.

On the lower left side of the case 31 in FIG. 1,
An air intake hole (not shown) is formed at a position facing the CCD 18. An exhaust fan 27 is provided on the upper right side of the case 31 in FIG. Next, the image reading operation and the insertion / ejection of the film holder 60 will be described.

When the film holder 60 is not inserted, the stage 47 of the main body of the image input device is at the standby position for inserting the film holder 60. The insertion standby position means that the stage 47 is at the position shown in FIG. 6 with respect to the fixing member 104. In this embodiment, when the stage 47 is in the insertion standby position, the arm portion 99a of the seesaw member 99 is
The distance between the fixing member 104 and the fixing member 104 is 1.5 mm.

The user can load the film 1 into the film holder 6
After setting to 0, the film holder 60 is inserted from the insertion opening 32. The film holder 60 is the film holder 6
The leg portion 76 of 0 advances on the stage 47 while sliding on the rail portion 101 of the stage 47. And the film holder 6
0 is fixed on the stage 47. The door 34 attached to the insertion opening 32 is interlocked counterclockwise in the drawing as the film holder 60 is inserted behind the stage. When the loading operation of the film holder 60 is completed, the stage 47 moves to the reading start position and the door 34 closes. Although details of the closing operation of the door are not shown in the drawings, opening and closing can be realized by using an appropriate force such as use of gravity, a coil spring, a torsion spring, a leaf spring, an electromagnetic force of a solenoid or a motor.

The stage 47 is driven by a driving mechanism to move backward, and sub-scanning for reading an image on the film 1 is performed. On the other hand, the light source 11 is turned on and the lighting unit 3
5, the reading position of the film 1 is illuminated. The light transmitted through the image on the film 1 is reflected by the mirror 46 and the lens 1.
An image is formed on the CCD 18 via 7. And CCD1
8 reads an image of one line. By repeating this reading operation in the main scanning direction while sequentially moving in the sub-scanning direction, that is, the moving direction of the film 1, 2
An image of the film 1 can be input dimensionally. The movement in the sub-scanning direction is performed by driving the stage motor 7 to move the stage 47.

In this way, the CCD 18 reads the image on the film 1, photoelectrically converts it, and outputs the image signal to an image processing section (not shown). In addition, the color filter 14 is red,
Filters of three colors of blue and green are provided, and a color image can be input by alternately irradiating the same image. The lens 17 and the CCD 18 are fixed and held on the imaging unit support member 21 at a constant interval. Further, the image forming unit support member 21 is driven by the focusing drive mechanism.

The focusing drive mechanism comprises a lead screw 22, a focusing motor 23, a guide bar (not shown) and a guide member (not shown). The lead screw 22 is screwed onto the imaging unit support member 21. Focusing motor 23
Is for rotating the lead screw 22. The guide bar (not shown) engages with the guide member (not shown),
It is for guiding the lens 17 and the CCD 18 in the optical axis direction.

In the image processing unit (not shown), in addition to image input processing, processing such as automatically performing the focusing operation while driving the focusing driving mechanism to perform contrast calculation is performed. During operation of the above image input device, heat is generated by driving the stage motor 7, turning on the light source 11, and the power supply 25 for driving the circuit. However, outside air is sucked in through the air intake hole 26 arranged near the CCD 18 below the case 31. Further, heat generated from the stage motor 7, the light source 11, the power supply 25, etc. in the case 31 is absorbed and then discharged to the outside by the exhaust fan 27. Therefore, it is possible to prevent the ambient temperature of the CCD 18 from rising.

The discharging operation of the film holder 60 is performed by moving the stage 47 in the forward direction. When the stage 47 moves forward and reaches the insertion standby position, the rear end of the film holder pushes the door 34 outward. Further, the film holder 60 is released from the stage 47 and moved in the discharge direction. The rear end of the film holder 60 is exposed to the outside of the insertion opening 32. Therefore, the user can take out the film holder 60.

When the film holder 60 is pulled out, the door 34 is driven by gravity or the like to close. Next, details of the film holder 60 will be described with reference to FIGS. 2, 3, and 4. The film holder 60 is composed of a frame 61 forming its outer shape and a turntable 62 rotatably held in the center of the frame 61. The frame and turntable are made of resin.

The film holder 60 is formed in a rectangular thin plate shape having a right cutout portion 63 and a left cutout portion 64 at the front end in the insertion direction. The right cutout portion 63 and the left cutout portion 64 have an asymmetrical shape. As shown in FIG. 2, the right cutout 63 has a front side wall 74a. Further, the left cutout portion 64 has a front side wall 74b. There is a right side wall 75a on the right side of the frame 61, and a left side wall 7 on the left side.
There is 5b. A groove portion 65 is provided on the upper rear portion of the frame 61 to facilitate insertion and removal operations. A slope 66, a positioning hole 67, and a convex-shaped sliding portion 68 are provided on the left and right sides of the front portion, following the cutout portion. As shown in FIG. 3, a plurality of claws 69 are formed around the turntable 62. The turntable 62 is rotatably held on the frame 61,
Even if it is upside down, it will not come off. Turntable 6
The lower surface of 2 has an opening (not shown).

An angle index 7 is provided on the outer circumference of the turntable 62.
1, the frame 61 is provided with an angle scale 72. A grid scale 73 is provided around the turntable 62. The slide portions 68 at the positions corresponding to the left and right of the turntable 62 are formed in a staircase shape and have a scale similar to the grid scale 73. Turntable 62
An opening (not shown) is formed at the bottom of the glass plate, a glass plate 80 is fixed to the upper surface of the opening, and a mask 81 corresponding to the size of the film 1 is attached. The mask 81 is positioned by the shaft 82 and can be replaced according to the size of the film 1.

A hinge 83 is provided at one end of the turntable 62.
A glass plate 85 is openably and closably supported via the frame member 84. At the other end of the turntable 62, a pressing portion 86 for locking the tip portion 84a of the frame member 84 is provided. In order to load the film 1 into the film holder 60, first, as shown in FIG. 4, the pressing portion 86 of the film holder 60 is displaced to move the tip portion 84 of the frame member 84.
Open a. The mask 81 on the glass plate 80 is replaced with a mask corresponding to the size of the film 1, and the film 1 is placed in alignment with the alignment portion 87 of the mask 81. The frame member 84 integrated with the glass plate 85 is closed and fixed by the pressing portion 86. The film 1 is two glass plates 8 on the mask 81.
It is sandwiched between 0 and 85 and held, and flatness is maintained. The film 1 as a transparent original is sandwiched between the glass plates 80 and 85 and can be observed in the frame member 84 and the opening, and can be read by a scanner as an image input device.

The mask 81 is for suppressing the influence of light from a portion without an image so as to obtain good read data without so-called fog. If the mask 81 is not used, the alignment portion 87 cannot be used, but the film 1
The position and angle can be determined by using the grid and angle scale of the frame 61.

As shown in FIG. 6, the film holder 60
Below there are a plurality of legs 76. The leg portions 76 are formed to have the same distance from the surface of the glass 80 on which the film 1 is placed. Next, using FIG. 5 and FIG.
The details around the stage 47 will be described. A stage 47 guided by a guide bar 91 is movably supported behind the door 34 having the shaft 33 as a rotation axis. Note that FIG. 5 and FIG.
The drive is not shown inside.

An opening 92 corresponding to the reading range of the film is provided at the center of the stage 47. A pair of side walls 93 having a tapered portion 93a are provided on the left and right of the stage 47. When the film holder 60 is attached to the stage 47, the side wall 93 of the stage 47 is attached to the film holder 6
It is configured to contact the side wall 75 of 0. By this contact, the film holder 60 is positioned with respect to the stage 47 in a direction substantially perpendicular to the insertion direction.

A leaf spring 94 is located slightly above and in front of the side wall portion 93.
Is provided as a set. The leaf spring 94 is for urging the film holder toward the stage 47. As shown in FIG. 6, the leaf springs 94 are the leg portions 76 of the film holder 60.
The part corresponding to is urged toward the stage 47. Therefore, the film holder 60 can be biased more stably.

A shaft 95 and an elongated hole 96 are provided slightly behind the side wall portion 93.
Returning member 9 guided by and biased by a tension spring 97
One set of 8 is provided. The return member 98 has arms 98a and 98c protruding inside the side wall 93. Arm 98
The a and 98c are arranged at positions where they abut the front side wall 74 in front of the film holder 60 when the film holder 60 is inserted.

A seesaw member 99 is installed on the rear side. A positioning shaft 100 is provided at the front end of the seesaw member 99.
Is attached. An arm portion 99a is attached above the center of the seesaw member 99. Seesaw member 9
9, the positioning shaft 100 is urged downward by a spring behind the shaft 9 as a rotation shaft.

A rail portion 101, whose height from the guide bar is accurately controlled, is formed at the portion where the stage 47 contacts the leg portion 76. The portion of the upper surface of the stage 47 other than the rail portion 101 is lower than the rail portion 101, and is configured not to come into contact with the film holder 60. When the film holder 60 is attached to the stage 47, the leg portion 76 of the film holder 60 and the rail portion 101 of the stage 47 are in contact with each other. As described above, the leg portions 76 are precisely shaped so that they have the same distance from the surface of the glass 80 on which the film 1 is placed. Therefore, the film 1 surface and the stage 47 surface are parallel. The distance between the film 1 surface and the stage 47 surface can be uniquely determined.

The portion of the film holder 60 with which the leaf spring 94 abuts is more convex than the other portions, and is precisely molded so that the distance from the bottom surface of the leg portion 76 to the convex portion is equal. . Further, the film holder 60 is supported on the stage 47 with a uniform force surrounding the screen center of the film holder. Therefore, one film and stage 4
The 7th plane becomes parallel.

As described above, in this embodiment, the leg portion 7
While sliding 6 on the rail portion 101, the film holder 60 is attached to the stage 47. Therefore, even if there is dust on the rail portion 101, the dust can be pushed away when the film holder 60 is attached. Therefore, the surface of the film 1 does not tilt with respect to the surface of the stage 47 due to dust.

A protrusion 102 is formed inside the seesaw member 99 on the left rear side of the stage. A female screw 103 is formed in the center of the rear side of the stage in the sub-scanning direction. The right side return member 98 has a light reflecting portion 9 on the outside of the stage 47.
8b is formed. The set of fixing members 104 is fixed to the image input apparatus main body independently of the stage 47.
The fixing member 104 is arranged so as to drive the arm portion 99a of the seesaw member 99 when the stage 47 moves forward of the film holder insertion standby position.

The reflective photoelectric sensor 105 is fixed independently of the stage 47. The reflective photoelectric sensor 105 is
When the film holder 60 is inserted into the stage 47 at the film holder insertion standby position, the right side return member 98
This is for detecting the light reflection portion 98b. A male screw 106 is rotatably supported on the back surface of the case. The male screw 106 and the female screw 103 of the stage 47 are arranged so that their axes match. In the moving range of the stage 47 during reading, the male screw 106 and the female screw 103 are located apart from each other,
Do not screw. When the stage 47 is moved further rearward of the reading range, the male screw 106 can be screwed into the female screw 103 of the stage 47 to fix the stage 47 to the case 31. Since the vibration during transportation does not adversely affect the guide portion of the stage 47, it is possible to read well.

Next, the situation in which the film holder 60 is positioned and held on the stage 47 of the image input device will be described with reference to FIGS. When the film holder 60 is manually inserted into the stage 47 at the insertion standby position, the sliding portion 68 is first urged by the leaf spring 94. Next, the slope 66 advances while lifting the positioning shaft 100. Then, the positioning shaft 100 falls into the positioning hole 67. During this time, the film holder 60 receives a force to be pushed back to the front of the stage by the arm portion 98a of the returning member 98. When the hand is released, the force to be pushed back causes the positioning shaft 100 to move.
The position is determined between the step 107 and the positioning hole 67, and the film holder 60 is locked on the stage 47 as shown in FIG.

The positioning hole 67 is a long hole.
Therefore, even after the film holder 60 is inserted and the engagement between the positioning shaft 100 and the positioning hole 67 is completed, there is room to move the film holder 60 further in the back. The movement of the film holder 60 after reaching this engagement state,
The reflective photoelectric sensor 105 detects the reflection of the reflecting portion 98b. By doing so, the completion of loading the film holder 60 can be confirmed. When it is detected that the film holder 60 is loaded on the stage 47 at the insertion standby position, the stage 47 is moved to the readable position of the film 1.

The shape of the space on the rear side of the stage 47 is asymmetrical to the left and right like the film holder 60 due to the protrusion 102 on the left back side. Therefore, for example, even if it is accidentally inserted inside out, it is not locked on the stage 47. The film holder 60 is pressed downward with respect to the stage 47 by the leaf spring 94 at the rear end of the sliding portion 68 and the step 107 of the seesaw member 99 at the front end.

Next, the situation where the film holder 60 is opened and discharged from the stage 47 of the image input device will be described.
When the stage 47 is at the insertion standby position, the arm portion 99a of the seesaw member 99 is at a position separated from the fixing member 104 by 1.5 mm. The stage motor 7 is driven to drive the stage 4
When 7 is moved from the insertion standby position to the discharge side, the fixing member 1
04 contacts the arm portion 99a of the seesaw member 99. When the stage 47 further moves, the fixing member 104 moves the arm portion 99a.
Is pushed to the rear of the stage to cause the seesaw member 99 to move clockwise in FIG. That is, the seesaw member 99 rotates in the direction in which the positioning shaft 100 is released from the positioning hole 67. When the stage 47 moves from the insertion standby position to the ejection side by 5 mm, the positioning shaft 100 is released from the positioning hole 67. Then, the film holder 60 is pushed back by the arm portions 98a and 98c of the returning member 98, so that its rear end can be pulled out from the insertion opening 32.

As described above, in this embodiment, when the film holder 60 is placed on the stage 47, it is fixed to the stage 47 by the urging force of the tension spring 97. At the time of discharging, the film holder 60 is discharged by the urging of the tension spring 97. As described above, the tension spring 9
Since the urging force of No. 7 is used for both fixing and discharging the film holder 60, there is an effect that the number of parts is reduced and the structure is inexpensive.

In the first embodiment, the thrust of the stage 47 by the stage motor 7 is used as the power for the releasing operation. Therefore, there is no need to install a special power mechanism for releasing the engagement between the film holder 60 and the stage 47, and there is an effect that the structure can be inexpensive. Positioning and holding the film holder 60 on the stage 47 of the image input device is easily performed by simply inserting the film holder 60 into the front insertion opening 32 of the image input device.
When the inserting operation is performed, the completion of the loading operation of the film holder 60 is detected. Then, the film holder 60 is pulled into the image input device, and the door 34 is automatically closed. The image reading is performed with the door 34 closed.

The opening and discharging of the film holder 60 from the stage 47 is performed by a switch (not shown) provided in the image input device or a command from a host computer connected to the image input device. Film holder 6
Since the rear end of the film holder 60 is automatically ejected from the insertion opening 32 with the opening operation of 0, it can be easily pulled out. When the film holder 60 is pulled out, the door 34 automatically closes.

Since the door 34 is closed during both image reading and non-image reading, it is possible to prevent light and dust from entering the image input device. The image read by the image input device can be confirmed on a monitor via a computer or the like, and the deviation of the image from a predetermined angle can be calculated. By ejecting the film holder 60 from the image input device and rotating the turntable 62 with reference to the angle index 71 and the angle scale 72, the orientation of the image can be adjusted.
If the film holder 60 is again inserted into the image input device and the reading operation is performed, the image data of the desired angle can be obtained.

Once the film 1 is set in the film holder 60, the position and orientation of the original document are uniquely determined by the positional relationship between the film holder 60 and the stage 47. Therefore, the position and orientation of the document can be easily reproduced even if the film 1 is repeatedly taken in and out from the image input device. Prepare multiple originals that have been set and memorize detailed conditions for reading such as film type such as negative and positive, reading range, reading resolution, exposure amount (accumulation time of CCD), and collectively. To read images (called batch processing)
There are cases. Even in such a case, it is convenient because the position and orientation are reproduced in the state when the conditions are set in advance.

Although the image input device and the film holder 60 which handle the film 1 as the transparent original have been described so far, it goes without saying that the invention can be applied to a reflective original. Next, a second embodiment will be described. FIG. 7 shows a perspective view of a document holder used in the second embodiment of the image input apparatus according to the present invention.

FIG. 8 is a vertical sectional view for explaining the second embodiment of the image input apparatus according to the present invention, showing a state in which the document holder is positioned on the stage. What is different from the first embodiment is a film holder 60 for setting the film 1 and a mechanism for releasing the film holder 60. The frame 61 and the turntable 62 of the film holder 60 are the same. The difference is that instead of two glass plates or frame members, an opening 120 is attached at the center and a tray 122 around which a leaf spring 121 is attached is attached. A recess is formed around the opening 120. The original to be read is the slide film 1 held by the mount 3, and the mount 3 is inserted between the leaf spring 121 and the tray 122 so that the screen corresponds to the opening 120. By doing so, the slide document is held by the film holder 60.

Film holder 60 for stage 47
The positioning of is similar to that described in the first embodiment.
Therefore, even with the slide film, the reading range can be reproduced even after the film is once taken out from the image input device, or even during batch processing. Therefore, it is possible to reproduce the reading range as before without any trouble.

In the first embodiment, the thrust of the stage 47 by the stage motor 7 is used as the power for the releasing operation.
That is, the stage 47 is moved by the stage motor 7, and the seesaw member 99 on the stage 47 is moved to the fixing member 10.
4, the film holder 60 is released. In the second embodiment, the positioning shaft 100 is released by a plunger type solenoid. That is, the pressing portion 1
23a moves to press the arm portion 99a to the rear side of the stage, causing the seesaw member 99 to move clockwise in FIG.

Similar to the first embodiment, the discharging operation is performed by a switch (not shown) of the image input device or a command from a host computer connected to the image input device. According to the mechanism of the second embodiment, it is not necessary to move the stage 47 for discharging, so that the image input device can be downsized. In the embodiment described above, the positioning hole 67 is an elongated hole, and the positioning shaft 100 in the elongated hole is
The loading detection of the film holder 60 is performed by using the movement distance of the. However, the positioning hole does not have to be an elongated hole.

In the second embodiment, the release operation is driven by the solenoid, but it can be realized by means such as a motor or a cam. In the embodiment described above, the positioning shaft 100 is attached to the seesaw member 99 of the stage 47, and the positioning hole 67 is provided on the film holder 60 side. Instead, a positioning shaft may be provided on the film holder 60 side and a positioning hole may be provided on the seesaw member 99 of the stage 47.

[0058]

Since the apparatus of the present invention has the locking means for locking the document holding means to the placing means and the locking release means for releasing the locking by the locking means, the document It can be easily attached and detached.

[Brief description of drawings]

FIG. 1 is a vertical sectional view illustrating a first embodiment of an image input device according to the present invention.

FIG. 2 is a perspective view illustrating a first embodiment of an image input device according to the present invention, showing a document holder.

FIG. 3 is a plan view of a document holder used in the first embodiment of the image input apparatus according to the present invention.

FIG. 4 is a perspective view for explaining a method of using a document holder used in the first embodiment of the image input device according to the present invention.

FIG. 5 is a perspective view illustrating a first embodiment of an image input device according to the present invention, showing a main part of a stage.

FIG. 6 is a vertical sectional view for explaining the first embodiment of the image input apparatus according to the present invention, showing a state in which the original holder is positioned on the stage.

FIG. 7 shows a perspective view of a document holder used in a second embodiment of the image input apparatus according to the present invention.

FIG. 8 is a vertical cross-sectional view illustrating a second embodiment of the image input device according to the present invention, showing a state in which a document holder is positioned on a stage.

FIG. 9 is a cross-sectional view showing an internal schematic configuration of an example of a conventional image input device.

FIG. 10 is an external perspective view of an example of a conventional image input device.

[Explanation of symbols]

 1 film (original) 2 slide 3 mount part 4 stage 5 holder 6 lead screw 7 stage motor 8 guide bar 11 light source 12 heat absorption filter 13 diffuser plate 14 color filter 15 condenser lens 16 mirror 17 lens 18 CCD 21 coupling part indicating member 22 Lead screw 23 Focusing motor 24 Case 25 Power supply 26 Air intake 27 Exhaust fan 30 Recessed cover 31 Case 32 Insertion port 33 Shaft 34 Door 35 Illumination unit 36 Original scanning unit 37 Imaging unit 41 First condenser lens 42 First Mirror 43 Second mirror 44 Third mirror 45 Second condenser lens 46 Mirror 47 Stage 60 Film holder 61 Frame 62 Turntable 63 Right notch 64 Left notch 65 Groove 66 Slope 67 Positioning Hole 68 Sliding part 69 Claw part 71 Angle index 72 Angle scale 73 Grid scale 74 Front side wall 75 Side wall 76 Leg part 77 Front wall 80 Glass plate 81 Mask 82 Shaft 83 Hinge 84 Frame member 84a Tip 85 Glass plate 86 Holding part 87 Position Mating part 91 Guide bar 92 Opening 93 Side wall 94 Leaf spring 95 Shaft 96 Elongated hole 97 Tension spring 98 Returning member 99 Seesaw member 100 Positioning shaft 101 Rail part 102 Projection part 103 Female screw 104 Fixing member 105 Reflective sensor 106 Male screw 107 Step part 110 Leaf spring 120 opening 121 leaf spring 122 tray 123 solenoid

Claims (5)

[Claims] 1. An illumination unit for illuminating an original, a photoelectric conversion unit for reading an image of the illuminated original, an original holding unit for holding the original, and a placing unit for placing the original holding unit. An image input apparatus having the image input apparatus, comprising: locking means for locking the document holding means to the placing means, and locking release means for releasing the locking by the locking means. 2. The engagement means engages with a positioning hole (or a positioning shaft) formed in the document holding means and the positioning hole (or a positioning shaft) and is formed in the placing means. A shaft (or an engagement hole), which is in contact with the document holding means and urges the document holding means toward the engagement position of the positioning hole (or the positioning shaft) and the engagement shaft (or the engagement hole). The image input device according to claim 1, further comprising a biasing unit, wherein the locking release unit releases the engagement shaft (or the engagement hole) from the positioning hole (or the positioning shaft). 3. The urging means urges the document holding means to eject after releasing the engaging shaft (or the engaging hole) from the positioning hole (or the positioning shaft). Item 2. The image input device according to item 2. 4. The engagement shaft (or the engagement hole) is arranged on a seesaw member rotatable about a predetermined shaft, and the locking release means rotates the seesaw member, The image input device according to claim 2, wherein the engaging shaft (or the engaging hole) is released from the positioning hole (or the positioning shaft). 5. The moving means for moving the placing means, the unlocking means further includes an abutting portion for abutting the seesaw member, wherein the moving means moves in a document discharging direction. 5. The image input device according to claim 4, wherein the contact portion is arranged so as to rotate the seesaw member accordingly.